WF 5218 Battery Monitoring and Balancing Node
The WF 5218 is a 12‑channel battery monitoring and balancing node for accurate cell measurement in series‑connected battery modules or packs. Each channel integrates a high‑voltage multiplexer, precision ADC, and a passive balancing resistor. The module also includes inputs for resistive temperature sensors.
A 1600 VDC double‑insulation barrier isolates the battery domain from the communication interface, providing highest personal safety in high‑voltage applications.
Multiple WF 5218 units can be connected in series and interfaced through the WF 5220 Gateway (USB) or the WF 5221 Gateway (EtherCAT). Both interfaces support open standards for easy software integration in common programming languages such as C, Python, C#, and LabVIEW.
$ 540.00
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Downloads, Information & Videos
Downloads
Data sheet
User Manual
AC0282-004 Battery Monitoring and Balancing System – User Manual.pdf
Application areas
– R&D battery‑stack monitoring
– Laboratory testing and prototyping
– Off‑line balancing
– BMS for energy‑storage system
– Second‑life evaluation of EV battery
– Battery state‑of‑health assessment
– EV battery service‑center diagnostics
Specifications
Analog Input Characteristics
– Number of channels: 12
– Measurement range Cn to Cn-1: 0 to 5 V
– Measurement resolution: 0.1 mV
– Measurement error: ± 1.0 mV typical
– Max sampling rate: 66 Hz
– Bulit in balancing resistor: 150 Ω
Temperature input Characteristics
– Number of channels: 3
– Measurement resolution: 0.1 mV
– Measurement error: ± x mV typical
– Max sampling rate: 66 Hz
Power supply
– V+ to V- Supply Voltage: 5-75 V (11-55 V for full meas. accuracy)
– V+ Current@sleep: 6 uA
– V+ Current@measurement: 16 mA
– Max samling rate: 66 Hz
Isolation Voltages (rated working voltage)
– Channel to channel: None
– Channel to Link, Continuous: 1 600 V Double Insulation
– Link In to Link Out, Continuous: 80 V Double Insulation
Environmental
– Operating temperature: -20°C to 60°C
– Indoor / Outdoor: Indoor use only
Mechanical
– Size (w x d x h): 137.54 x 63.32 x 31.00 mm
– Weight: 128 g
Features
– 12‑channel cell‑voltage measurement (0–5 V per cell)
– Integrated passive balancing on all channels
– Inputs for resistive temperature sensors
– 1600 VDC double‑insulation barrier for highest personal safety
– High‑resolution ADC with 0.1 mV resolution
– ±x mV typical measurement accuracy
– Daisy‑chain of up to 16 nodes per gateway
– Compatible with WF 5220 (USB) and WF 5221 (EtherCAT)
– Open communication interfaces for easy software integration
Shipping information
– Country of Origin: Sweden (SE)
– Harmonized System (HS) Code: 903290
– Combined Nomenclature (CN) Code: 903290.00
– TARIC Code: 903290.00.90
General information about WF 5218
How many battery cells can the system monitor?
Each WF 5218 measurement node monitors up to 12 cells. A single gateway can communicate with up to 16 nodes, allowing one system to monitor as many as 192 individual cells.
Why monitor individual battery cells instead of only pack voltage?
Pack voltage alone cannot reveal whether individual cells are becoming unbalanced, overcharged, or degraded. Monitoring each cell separately provides valuable insight into battery health, performance, and safety.
Does the system supports cell balancing?
Is calibration required?
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